指针运算符重载，智能指针

#includeusing namespace std;class person {public:person() { cout << "无参构造的调用" << endl; }void show(){cout << "年龄为："<<18 << endl;  }~person(){cout << "析构函数的调用" << endl;}};void test(){person* p=new person;p->show();}int main(){test();system("pause");return 0;}

智能指针：托管new出来的对象的释放

#includeusing namespace std;class person {public:person() { cout << "无参构造的调用" << endl; }void show(){cout << "年龄为："<<18 << endl;  }~person(){cout << "析构函数的调用" << endl;}};//智能指针class smartpoint {public:smartpoint(person* person){this->p = person;//指向在堆区开辟空间的地址}//重载->运算符号person* operator->(){return this->p;}//重载*运算符号person& operator*(){return *(this->p);}~smartpoint(){if (p != NULL){delete p;p = NULL;}}private:person* p;};void test(){/*person* p=new person;p->show();*//*delete p;*///智能指针：托管new出来的对象的释放smartpoint sp(new person());//重载->运算符//这里sp->返回的是person*sp->show();//本质sp->->show(); 编译器简化为sp->show() sp.operator->()返回值是*person(*sp).show();//*sp相当于-----sp.operator*(),返回值是(*person)}int main(){test();system("pause");return 0;}